Our drop-forge production process yields a much higher strength-to-weight ratio compared to cast or machined aluminum components, making the NRS Aluminum Oarlock both lightweight and incredibly strong. It is extremely hard to "pop" an oar through the tines of the NRS Aluminum Oarlock, allowing you to row big water with more confidence. If somehow you do pop an oar, the tines return to their original shape, so you're not left with a bent oarlock. In drop forging, a metal blank is heated to a precise temperature, then the part is stamped out under extreme pressure. The secret to the part's strength is the aligning of the metal's crystalline structure by the heat and stamping. Durable anodized finish eliminates oxidation and discoloration. Smooth finish protects oar shafts, rope wrap and oar sleeves from wear. Includes split rings to keep the oarlock from riding up.